Improvement in windlasses



UNITED STATES WILLIAM H. EAEEIELD, 0E LONDON, ENGLAND.

` IlVlPROVEMEN'l` IN Wl-NDLASSES.

specincanon forming pmt of Letters Patent No. 93,875, dat-d August 17, 1869.

Figure l is a front elevation; Fig. 2, a plan' view, a portion being shown in section; Fig. 3, an end elevation. Fig. 4 is a section through the drum a, showing the disks c c in elevation.

Fig. 5 is a detached view ofthe hand-wheels;

Fm. 6, a section through the chain-wheel.

Like letters indicate corresponding parts.

The object of my invention is to dispense with the rigid connector hitherto used in connecting the freely-revolving chain-.wheel with the main barrel of the windlass, substituting a frictional connector, which also acts as a brake to check the cable in veering, and ena- `bles one chain-wheel to be used independently of the other.

The manner in which I Vapply thcv frictionconnector is shown on the drawings, and is as follows: The chaiu-wheelAis consti noted with adrum,`a,vwhich overlaps theboss b otpurchase wheel B, Fig. 2. In the annular space between boss of purchase-wheel b, and overhanging drum a of chain-wheel, is tted a, double se- ,ries of disks, cand c', (shown in section in Fig. 2,)

`one series, c, being fitted toslide on lateral pro- 'jections or feathers d, Fig-4, in Interior of drum a, therefore having the same circular motion, the other series, o', in like manner sliding on lateral feathers e on exterior of boss b,`and revolving with purchase-wheel B. The disks-fc on the purchase-'wheel alternate with those on drum a; but as they are free to move in a lateral direction the chain-wheel A, with its series ot' disks c', can be revolved freelyand quite independent of purchase-wheel B with itsseries otdisks o.

Whenitisrequired'either to check the veering ont ofthe chain orto connect the chain-wheel to the windlass for heaving in, thcrwhole series of disks are compressed together, by which the friction due to the power applied is multiplied by the number of surfaces in the double series of disks. This compression of the disks is 'accomplished in the' following manner: -The outside disk, e', from the purchase-wheel has three bolts, f, which pass throught he purchasewheel, and are secured to a nut,g, on the other side, which is acted upon by a screw, h. mounted loosely on the spindle t' and revolved b v ahandwheel, l. This screw h bears ag-iin t the purchase-wheel, and whenit is revolved inone direction it draws the nut g from the. purchasewheel and compresses the whole ot' the disks together, the reverse direction releasing them. I prefer to make the disks c on the purchasewheel ot galvanized iron and the disks c in drum ot' teak, but other materi. ls may be used.

A further part of my invention relates to an easy method of varying the power or speed of windlasses; I do this by casting two holes, m and n, for Ilevers O, side by side, through the whole length of the cross-head P. Thil levers,

being disconnected, can very readily he moved in or out, thus varying the power by increasing or diminishing their ei'ective length. A collar, p, passes through the cross-head, securing levers when put in the position required.

I do not claim the arrangement ot a double seriesof disks forthe purposr-ot producingtriction; but

What Iclaim as my invention, and desire to secure by Letters Patent, is-

Thecombination and arrangelnentot'theeompressor, purchase-heel B, nut g, and screw It, to form a windlass and brake, and by means ot which the chain-wheel can be emploi ed independently ofthe other,lsubstantially as described.

In witness whereof I have hereunto signed my naulein the presence otl two subscribing witnesses.

WILLIAM HORATIO HARliIllIil).

Witnesses: i

JN0. BUDGES, vSAME. BEooKEs. Y 

